Machine for molding sand-paper disks



(Hommel.)

, J. G. BUZZELL.

MACHINE FOR MOLDING SAND PAPER IJISKS.4

l Il PETERS. Pholo-liwolnpher. Wilhllgon, l!4 C UNITED STATES PTENT CEEICE..

JOHN e. BUZZELL, OE LYNN, MASsAoHUsErrS.

MACHINE FOR MOLDING SAND-PAPER DISKS.

SPECIFICATION forming part of Lettersv Patent No. 260,368, dated July 4, 1882.

Application led February 23, 1882.

ing Sand-PaperDisksforShaving and Whiten' ing Leather, of which the following is a specitication.

The invention has forits object the molding of the abrading-disks' which are shown, described, and claimed in Letters Patent ot the United States No. 252,928, issued to myself on the 31st day of January, 1882, said disks being employed in connection with a rotary supportingcushion driven by suitable machinery for shaving and whitening leather,l as is set out and described in said Letters Patent; and my present invention consists in the construction and combination of the divers devices embodied therein, as hereinafter more particularly and fully set forth and claimed.

Figure l shows in side elevation a machine or apparatus embodying my invention. Fig. 2 is a longitudinal vertical section of Fig. l, except that the steam-pipes are shown in elevation. Fig. 3 is an enlarged detached view, showing one ofthe molding dies with the lower portion ofthe actuating-screw shown in eleva.

tion.

ln said views, A A represent end supports iioor or upon a bench.

O represents a metallic steam-chest, provided with an intlowpipe, a, having a regulating and shut-oft' valve, b; and c is an outilowpipe, also connected with chest C and provided with a regulating-valve, d.

rlhe lower halves, c, of the molding-dies D are secured upon the top ot' the lid f of chest C, as shown in" Figs. l, 2, and are heated to the desired temperature by the conducted heatof the steam admitted into chest G through pipe c, which heat is regulated by means of the described valves in the intiow and Out-How pipes.

To each upper half of dies D is connected the actuating-screw h by means of screws t', which are threaded in the socket of g, and engage in concentric groove j in the screw, thereby allowing the screw to rotate freely; yet causing it to raise the upper halt', g, ofthe dies when retracted. Said screws h are re- (No model.)

spectively threaded in beam E, as show n in Fig. 2, and they are actuated by means ot hand-wheel k, the socket in the lower end ot the stem l thereof engaging the square upper portion of said screws, as shown at the righthand screw in Fig. 1, and the same, being removable, can be successively applied to said screws h for the purpose of'actuating them, thereby admitting the arrangement of said dies in a smaller space than would be requisite if each were permanently provided with means for actuating it.

The lower half, c, of die D isv formed with a central hole, m, to receive the corresponding pin, a, in part g. Said part e is formed with a depressed center, s, surrounding which is the area having a convex cross-section, as shown at t, which at its outer periphery retires at or near a right angle to the plane of the die, as shown at c, the upper halt', g, of the die conforming to the described contour of part c.

The disks or blanks are eut from the sandpaper of the requisite size, and with a central hole to receive pin n to center them relatively to the die, when they are placed between the halves of the heated and open die, with the sanded side upward, and by means of wheel 7c acting upon screw h the dies are brought as near together as the thickness of the paper admits, when the heat of the dies in a few moments permanently sets the disk in its molded form, when it may be removed and the operation repeated, such setting to shape taking place so quickly that with a press having ve or six molds the operator may be constantly employed in removing the molded and set disks and in replacing the same with blanks to be1nolded.

I claim as myinvention The combination of steam-chest C, its inlet and outlet conduits, provided with regulatingvalves, the divided molding-dies D, having one half secured to and arranged to be heated by said steamchest, and provided with means for raising and lowering the upper half of the die and exerting the requisite molding force upon the inserted disk, substantially as specied.

JOHN G. BUZZELL.

Witnesses:

T. W. PORTER, H. H. LETTENEY. 

